Please fill out the form below for Mask Oxygen Alt For C7040 18 and get a quote for part number 174530-18 by Bombardier Aerospace, please include required quantity along with expected turn around time. Our knowledgeable account manager will reply you shortly. Also check for the related parts for part number 174530-18. ASAP Aerospace distributes nose to tail NSN components, sub-assemblies, and assemblies for the aerospace and aviation industry.